Dipper tooth



Patented Mar. 4, 1.924.

UNITED STATES PATENT OFFICE.

VOORVHEES N. SEAL, OF CARLISLE, PENNSYLVANIA, ASSIGNOR T THE lFROG SWITCH &v MANUFACTURING COMPANY, 0F CARLISLE, PENNSYLVANIA, A. CORPORATION 0F PENNSYLVANIA.

DIPIER TOOTH.

Application lledNovember 14, 1922. Serial No. 600,799.

To all lwhom t may concern.'

B e it known that I, Voommns N. SEAL,

a citizen of the United. States, .residing at Carlisle,- in the county of Cumberland and State of Pennsylvania, have invented certain new' and useful Improvements in Dipper Teeth, of which the following is a specification. v

This invention relates to dipper teeth, es-

pecially adapted for use in connection with clippers in excavating machines or the like,

the invention having to do particularly with an improvement in reversible and renewable twofpart dipper teeth.

An object of this invention is to provide a. dipper tooth of the foregoing class havmg improved means for interlocklng the parts of theI tooth so as to resist the spreading of the bifurcated ends of the tooth point and to relieve the connecting bolt or bolts of excessive strain during use.

Other objects of this invention .will appear in the following description thereof, reference being had to the acccompanylng drawings'forming a part of this specification, wherein like reference characters 11i-i dicate corresponding parts in the several views and wherein Fig. 1 is a. side view partly in section illustratmg a form ofdip- .per tooth embodying my invention; F1g. 2 1s a top view thereof; Fig. '3 is a fragmentary view partly in section illustrating another form of dipper tooth embodying my invention; Fig. 4 is a pers ective view of the dipper tooth point;and ig. 5 is a fragmentary perspective view of the dipper tooth base. v

The present invention embodies certainimprovements over my prior Patent No. 1,330,143 dated February 10, 1920. In this patent it will be noted that the 'wedgeshaped nose of the dipper tooth was provided withV a three-stepped formation, and

the interlocking lugs .at the rear or base A.of the nose were formed from the rear and bottom walls of the upper step or offset and projected forwardly over the intermediate step,` overlapping a shelf or bolt seat in the point.

I have found in use that this structure can be materially strengthened and cheapened by roviding the 'wedge-shaped nose of the dipper tooth base with only two 'struction strengthens the bifurcated arms `vtooth comprises a suitable base 2 having steps or offsets, the upper step thereby being of considerably greater depth, thus er- 65 mitting an auxiliary bolt to be used w en` desired, and permitting the rear lugs to be so constructed in spaced relation from tho bottom of the upper step or offset so as to cause these lugs to overlap a considerably greater portion of the point. By this improved construction it is also possible for the bolt seats of the point to extend under the major portion of the lugs, and furthermore it is possible to greatly strengthen the bifurcated arms or ends of the point by having the bolt seats extend integrally to-'the rear of the arms. This last conagainst lateral strains or shocks to which the point is subjected in use.

In the drawings, wherein I have illustrated preferred embodiments of my invention,I it will be seen that this improved a forwardl rojecting wedge-shapednose 3 of stepedp or offset formation. The wedge-shaped vnose in this instance comprises a forward tapered ste orlofset 3* and a rear tapered stepor o set 3" of considerably greater depth or length, and the nose is provided with two pairs of lugs, the

lugs at each side being shown located in almement one pair forwardly of the other. The lugs 4--4 are located at the apex of the 85 nose or on the forward step 3a thereof, while the lugs 5-5 are located at the base of the nose or adjacent to the rearwardstep 3" thereof. It will be noted that each lug 5 projects forwardly from the rear wall 5A of the step-or offset 3", and the vmajor portion vof thebottom of the lug is preferably undercut so as to lie in spaced relation from the bottom wall of the step 3", as will. be clearly seen in Fig.' 1. As shown in Figs. 1, 2 and 5, the rearward step or o'set The dipper tooth point 9 is bifurcated to provide a pair of rearwardly extending arms or projections 10, the opposed inner cessed from the rear end thereof as 'at 12 walls or faces of which are provided with suitable recesses l1 for the reception of lugs 4 4. These lugs are adapted to prevent or resist sidewise play or movement of the point relatively to the bolts and therefore assist in preventing any tendency to shear the belts. Each arm of thepoint is. re.-

to provide a seat or shelf 13 for receiving theconnecting bolts, and as shown in Fig.

' and between the same, projects underneath the major portion of the lug 5, as clearly shown in Figs. 1 and 2. Thus it will be lseen that the major part of the bottom wall of each lug 5 is utilized for'the purpose of overlapping the shelf or seat 13, the lug being of suchwidth as to it into the recess y 12 between the end portions 14. f

As a result of this improved construction, the lugs' 5 will resist the spreading of the bifurcated point, will in conjunction with the lugs 4 4 prevent any-shifting or sidewise play ofethe point relatively to the nose, and wil cooperate to prevent shearing of the bolts 1'4". As illustrated in Fig. 3, the point and base may be connected together by means of a single. bolt, and since the major portion of the lugs 5-5 overla the bolt seat, maximum reslstance to thes earing of the bolts and to the spreading of the point is obtained.`

It will thus be observed that certainy important advantages of the present structure over my prior patent are obtained. By this improvementl it is possible to provide a considerably stronger structure due to the fact that the rear lu overlap to a greater extent the bottom of t e bolt recesses in the point, and to a greater degree preventing spreadin of the bifurcated ends of the point and l re eving the bolts of excessive strains or shocks. Considerable saving in the cost of manufacture results due to the fact that it is easier and cheaper to grind the offset ortions of the nose and point and provi e a proper fit between the parts. Also the increased area of the upper step permits the utilization of a plurality of connecting bolts when it is desired to construct lar er or stronger teeth for heavier work. his is furthermore permitted without at the same time neressitating any substantial proportionate increase in the size of the nose and point, thus reducing the amount of', material and hence the cost. By virtue of the present construction also the arms 1G are stronger due to the fact that the shelf or seat 13 extends substantially to the rear ends of the arms thereby connecting. all of the parts thereof. l c

Itwill be understood that by describing in detail herein any particular form, structure, or arrangement, it is not intended to limit the'invention beyond the scope of the several claims or the requirements of the prior art.

I claim as my invention: l

l. In a dipper tooth, the combination of a base comprising a nose provided adjacent the rear thereof with a forwardly projecting lug spaced inwardly from the slde edges or the nose and having substantially the entire bottom thereof spaced from the nose, and a point carried by said base and having a. recess for receivin said lug, said recess forming at the sides t ereof a pair of spaced substantiallj.T parallel ribs and having a bottom wall connecting said ribs together from end to 'end thereof,said wall extending under sidl lug substantially the entire length of t e u 2. Ich a dipper tooth, the combination of a point bifurcated to form a. pair of jaws, each having the outer face centrally recessed to form a pair of spaced ribs and a. bottom wall connecting said ribs together substantially from end to end thereof, and a base having a -nose extending between said jaws and provided at opposite sides with a centrally located lug extendin between said ribs and undercut to cause su stantially the entire underface of the lug to overlap said bottom wall.

3. In a dipper'tooth, the combination of a base having a wedge-shaped nose, a pair of oppositesides of said nose having each a transverse shoulder located between the ends of the nose and forming a lower tapered face and an upper tapered face of greater depth, each of said upper tapered faces terminating at the rear in a shoulder providedr with a forwardly` projecting lug havin substantially the entlre bottom face spac from the tapered face of the nose, and a point bifurcated to provide a pair of jaws constructed to embrace said nose, each jaw having an exterior recess` for receiving ,one of said lugs and each recess having a bottom wall extending substantially to the rear l end of the jaw and overla ped by a lug, and one or more bolts extending throuh said bottom'wall and upper tapered face or connecting the, point and base together.

4. In a dipper vtooth the combination of a point bi'furcated to provide a pair. of jaws,

each exteriorly recessed to, provide spaced lengthwise extending projecting portions an a bottom wall integrally connecting said projections substantially from end to end from the face of said nose, said lugs extendthereof, a base having a nose fittin between ing between said projecting portions and said jaws, the opposite faces of sai nose -tersaid bottom walls extending underneath 10 minating at the rear in shoulder portions, a substantially the entire lugs.

lug formed and extending forwardly from Signed at Carlisle, Pennsylvania, this each shoulder portion centrally thereof, each 10th day of November, 1922. v lug. having the bottom wall thereof spaced VOORHEES N. SEAL. 

